Now synthesis was explicable neither by reference to pure thought, the logical or elaborative faculty, which in Kant's view remained analytic in function, nor by reference to the effects of external real things upon our faculties of cognition.
But it is readily seen, and in the Logik Kant shows himself fully aware of the fact, that these pure connective links of experience, general aspects of objects of intelligible experience, do not resemble concepts formed by the so-called logical or elaborative processes from representations of completed objects.
For Jacobi understanding, or the logical faculty, is purely formal or elaborative, and its results never transcend the given material supplied to it.